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ADS5263-board layout

Anton Fortunatov
Prodigy 80 points
Other Parts Discussed in Thread: ADS5263, ADS5263EVM

What ground wiring pattern do you recommend? "Figure 105. Layout of Board", p.73 of ads5263's datasheet shows common ground plane both for analog (AGND), digital (LGND) ground pads of ads5263. We are considering to split them into 2 ground planes, connected at one point in order to reduce interference between digital signals and analog part of ADC. Would you recommend such practice and where should we connect those ground nets to each other?

  • 0
    TI__Mastermind 18285 points
    Anton,

    I'm assigning your post to the correct applications engineer.
  • 0
    TI__Genius 12025 points

    Hi Anton,

    Thanks for using our ADS5263 device.

    We will look into your questions.

    And we will replay to you soon.

    Thank you!

    Best regards,

    Chen

  • 0
    TI__Genius 12025 points

    Hello Anton,

    How are you?

    Thanks for using our ADS5263EVM.

    To separate AGND and DGND, our ADS5263EVM uses 2nd layer as the ground plane

    and split it into left (as AGND) and right (as DGND) portions except at the center part of the plane (connected).

    Please look at the following:

    If you zoom in the above plot, then 1st layer and 2nd layer are shown together:

    1st layout shows analog input signals including clock-in (on the left hand side) and digital output signal (on the right hand side).

     

    Thank you very much.

    Best regards,

    Chen

  • 0 in reply to Chen Kung
    Prodigy 80 points

    Thank you, Chen! Is it possible to get digital version of those layouts?